I am at the moment preparing to replace my heavy duty brass door hinges on my back kitchen door. To do this properly I have to remove the door.
In order that I drill the screw holes accurately and centre I have invested in a set of self centring drills, The brass screws that came with the hinges are a size 10 now looking at the chart of drill sizes for this size screw it calls for a .190" diameter drill which is around 3/16" Now I selected the centring tool with that size drill but unfortunately the spring load guide is smaller in diameter than the holes in the hinges and will therefore not work. Do they make special centring tools for this type of hinge the only other answer the way I se it is to buy bigger diameter screws but I am not sure that this is the right way to go about it.
Doors – fitting heavy duty brass door hinges
doors
Related Solutions
Rot needs moisture to get started, so it's unlikely that an interior door frame would be rotten without you seeing other signs of water damage on the walls, floors, ceiling etc. nearby.
A quick test for rot in wood is to try to push the point of a pick or the blade of a small flat-head screwdriver or into the wood: if it resists, the wood is sound and if it pushes in easily, it's rotten.
If you're really concerned that the frame is rotten, you should think about replacing it: it would be very hard to be sure that you've covered the entire rotten piece with hardener just by going through the screw holes.
Otherwise, I'd just go with my advice from the question you linked to.
I see in your picture that there is a wooden shim between the door frame and the jack stud. Typically the frame should be screwed into the jack stud separately from the door hinge. The small door hinge screws should only have to hold onto the frame of the door and usually don't need to be driven into the wall stud.
A fire door can be quite heavy though and might need a bit more.
You can see here that they make door hinge hardware that comes with at least one extra long wood screw that will anchor your door hinge to both the door frame and the jack stud. This will also further strengthen the door frame itself.
Go to the door accessory section of your local hardware store and find where they keep plastic packs of door hinge hardware. Each hinge typically comes with short screws and one long screw. Each pack is cheap, usually under $4, you will need three. Make sure you match the shape and hole pattern of the existing door hinge.
Best Answer
I'm assuming you're asking about drilling holes in the jamb and the door because the new hinges have different holes. If I've misunderstood your issue, I'll edit.
Mark your holes from the hinge with a sharp pencil. Punch a divot in the middle of the circle with a nail or screw. If you look at it and it seems a little off center, do it again, but angling toward center. Keep making the divot deeper until you think it's dead center. (Nothing wrong with practicing all this on scrap. Nobody was born with these skills.)
Now drill. (3/16" sounds a little big to me, but I haven't consulted any charts, so maybe you should ignore me on this point. Steel screws will be different from brass screws and different woods are, well, different.) Keep the drill bit perpendicular (use someone to look at your angle and guide you if available). If you creep off center, angle the drill toward the center and resume.
If one of your four holes is a little wrong, screw that one last. If they're all wrong (hopefully in different directions), use them to push/pull the hinge to the right place.
If, when assembling the door, the hinges are a little off, feel free to tap them gently with a wood block (to protect the finish) and hammer to encourage them to mesh. If they're way off, loosen the screws, mesh them, and tighten the screws again.